Sand casting mold riser/sprue sleeve
AssigneePyrotek, Inc.
InventorMark W. Reynolds
Life of this patent
Estimating the term…
Abstract
The sprue/riser sleeve 40 has a tubular, preferably cylindrical wall 42 extending between an inlet end 48 and an outlet end 50. The sleeve 40 has a woven mesh filter extending across a central passageway 51 with a periphery 54 of the filter 52 embedded into the wall 42. The periphery 54 has three or more, evenly spaced tabs 56 formed thereon that project further into or through the wall to secure the filter to the wall without materially weakening the wall. Preferably, the filter has a square-shaped periphery 54 with corners 64 that define the tabs 56. The main portion of the periphery extends into the wall less that one-half the thickness of the wall, whereas the tabs extend into the wall a distance greater than one-half the thickness.
Claims13
A sand casting mold riser/sprue sleeve, comprising:
- a refractory body having an elongated, substantially tubular wall with interior and exterior wall surfaces extending between an inlet end and an outlet end about a central passageway;
- a woven flexible mesh filter extending transversely across the central passageway adjacent the outlet end in which the filter has a periphery embedded in the refractory wall;
- and
- said mesh filter having at least three mounting tabs formed about the periphery projecting into the body wall toward the outer wall surface to frictionally secure the mesh filter to the tubular body to prevent the mesh filter from being dislodged from the refractory body as molten metal flows through the central passageway.
Dependencies are inferred from the claim text.